Published in 2005, the narrative swaps between two shorelines. The first has a modern-day archaeologist who makes a startling discovery in a cave in the south of France. The second follows a young woman living in nearby Carcassone in 1209 which became a military target after the Catholic Church declares the sect which rules the town as heretical.

Adrian Hodges (“Primeval”) is adapting the script and shooting takes place this Fall in southern France for airing next Spring. The companies previously teamed on last year’s epic mini-series adaptation of Ken Follett’s “The Pillars of the Earth” and Tandem is also starting production this year on the eight-hour TV adaptation of Follett’s ‘Pillars’ sequel “World Without End.”